2. Give the following answers to two signiﬁcant ﬁgures. a) Get up, walk around, and count the number of breaths you take in a minute.
b) Suppose you are enjoying a snowy day with a nice stroll outside where the temperature is —7.6 °C. Your body breathes in this cold air and then needs to
spend energy to change its temperature to your own, 37 °C. Suppose each breath
takes in a half a liter of air that has density pail- = 1.2m1 0’3 g/mL and specific
heat one-fourth that of water’s. How much energy do you spend warming the air
you breathe while walking outside for 1 hour in these conditions? (Remember to
convert units where necessary!) Science